Is it mandatory to have the stage mic pointed downward towards your res?

Any of you feel pressure to accept a mic pointed horizontally, to avoid sounding like a prima donna, when you are performing with a small footprint microphone presence? My gut is that a mic really needs to be pointed downard at the reso, but that basically requires me to have my own mic. Selfish, right? I think that if you share a mic with a guitar for instance, it is just not going to serve the reso very well. Looking forward to your opinions. One of the reasons that we pick a single mic or low mic count setup is to make setup easier and also for us to be able to hear each other because of the proximity. Obviously if everyone has their own mic then that defeats the purpose - "those damn reso players are so high maintenance."